【单选题】
第1716题：冷区安全阀内漏，常常会看到阀后管道___现象。
A. 振动
B. 结霜
C. 发热
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答案
B
解析
暂无解析
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第1721题：使用单位应当于压力容器定期检验有效期满前___，向特种设备检验机构提出定期检验的要求，特种设备应按要求，及时进行定期检验。
A. 1个月
B. 6个月
C. 一年
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第1722题：燃烧的充分条件是___。
A. 一定浓度的可燃物，一定比例的助燃剂，一定能量的点火源，以及可燃物、助燃物、点火源三者要相互作用
B. 一定浓度的可燃物，一定比例的助燃剂，一定能量的点火源
C. 一定浓度的可燃物，一定比例的助燃剂，点火源，以及可燃物、、助燃物、三者要相互作用
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—When is your English class? — ___ 8：10 ____8：55.
A. At；and
B. From；to
C. From；and
D. At；to
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I eat ___ breakfast at seven thirty. After ______ that，I go to school.
A. /；/
B. the；/
C. the；the
D. /；the
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— ___do you go to work? — _______ eleven o'clock.
A. What；At
B. What；On
C. When；At
D. When；On
【单选题】
Lucy has an interesting ___．She ________ at a TV station.
A. work；works
B. work；job
C. job；works
D. job；job
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—Do you know Li Le? —Yes，he's a good student.He's never late ___ class.
A. at
B. in
C. for
D. from
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— ___ does Tom usually __________ at 11：00 a．m.? —He usually plays soccer with his friends.
A. What；do
B. How；do
C. What；does
D. How；does
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—What's the time? —It's 12：00. Let's go for ___ ．
A. breakfast
B. lunch
C. supper
D. dinner
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Tina wants to take ___ shower after playing ______ pingpong.
A. a；the
B. the；the
C. a；不填
D. the；不填
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Sally has a busy ___，so she has much _______ to do every day.
A. work；work
B. job；work
C. job；job
D. work；job
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—Mr. White，do you think the fish ___ good? —Yes，I like it.
A. sounds
B. tastes
C. sees
D. eats
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— ___Jack go to school at 7：00? —Yes，he goes to school early.
A. Is
B. Do
C. Does
D. Are
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—What's your father's ___________，Jenny? —He is a P．E. teacher.
A. name
B. job
C. time
D. photo
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—When do you have ___________ breakfast? —At 6：30.And I have ________ big breakfast every day.
A. /；a
B. a；a
C. a；/
D. /；/
【单选题】
I have a dance lesson __________ 3：00 _______ Sunday afternoon.
A. in；on
B. at；in
C. on；in
D. at；on
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My grandfather eats well and ___________ every day，so he is very healthy.
A. writes
B. draws
C. exercises
D. sings
【单选题】
—Do you like this story? —Yes，I do. It's very ___________.
A. busy
B. boring
C. funny
D. difficult
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Simon is not a good boy，so we ___________ play with him.
A. always
B. usually
C. sometimes
D. never
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There are ___________ students in our class，twentyfive boys and fifteen girls.
A. twenty
B. thirty
C. forty
D. fifty
【单选题】
—Jim can't play volleyball. —Mike can't play volleyball ___________.
A. too
B. either
C. also
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____ _______ my mother gets home，she always makes dinner first.
A. When
B. Where
C. Why
D. What
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After school，I usually play basketball with my classmates ___________ an hour.
A. to
B. in
C. at
D. for
【单选题】
Chicken is my favorite food.It ___________ very good.
A. sounds
B. looks
C. tastes
D. shows
【单选题】
—What time do you have dinner? —___________.
A. In the evening
B. At six thirty
C. On weekends
D. With my parents
【单选题】
Here are your brother's clothes.Go and help him ___________ quickly.
A. clean the room
B. get dressed
C. take a shower
D. do his homework
【单选题】
—What time is it，Mom? [7.;15] —It's ___________.
A. seven fifteen
B. a quarter to seven
C. a quarter past six
D. six thirty
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