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【单选题】
车床主轴箱内的润滑油一般( )更换一次。A.
半年
B.
3个月
C.
1年
D.
随时
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【简答题】随机存储器可以分为 和 两种。
【简答题】给下列的问句选择合适的答语。 ( ) 1. What are they doing? ( ) 2. How old are you? ( ) 3. What's the matter? ( ) 4. How are you? ( ) 5. Today is my birthday. A. Happy birthday. B. My head hurts. C...
【简答题】英汉互译。 1. go to the train station __________________ 2. 去睡觉 __________________ 3. What's the matter? __________________ 4. 一双袜子 __________________ 5. Good night! __________________ 6. 请不要乱跑！ __________...
【单选题】They lost their way in the forest, and _____. Which of the following is wrong? [ ]
A.
what made matters worse was that night began to fall
B.
what was worse, it was getting dark
C.
to make matters worse that night was falling
D.
worse still, night had fallen
【单选题】It’s necessary to _________all the lights before you leave the classroom.
A.
turn on
B.
turn off
C.
turn down
D.
turn up
【单选题】At the same time, after what you have said, I do not feel ______ in deciding on this matter entirely by myself.
A.
justifiable
B.
justificative
C.
just
D.
justified
【单选题】已知反应2NH3=N2+3H2在等温条件下，标准平衡常数为0.25，那么，在此条件下，氨的合成反应0.5N2+1.5H2=NH3的标准平衡常数为。
A.
4
B.
0.5
C.
1
D.
2
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