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【单选题】
I could have helped him out, to tell the truth, I _____ too busy.A.
am
B.
was
C.
have been
D.
had been
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【多选题】关于挥发油的沸点,表述正确的是()
A.
组成挥发油分子的碳原子数越多，沸点越高
B.
在单萜中沸点随双键的增多而升高
C.
含氧单萜的沸点随官能团的极性增大而升高
D.
与单萜双键的数目无关
【简答题】分离沸点不同的挥发油的方法（ ）。
【单选题】听力原文：M: Excuse me, do you mind answering a few questions? W: No. M: Um, firstly, do you ever eat fast food? W: Yes, I do. M: What kind of food do you normally eat? W: Oh, er, you know, burgers, sandwi...
A.
French fries.
B.
Bagels.
C.
Sandwiches.
D.
Burgers.
【单选题】听力原文：W: Excuse me, do you mind answering a few questions? M: No. W: Firstly, do you ever cat fast food? M: Yes, I do. W: What kind of fast food do you normally eat? M: Oh, you know, burgers, sandwiche...
A.
Fried chicken.
B.
Sandwiches.
C.
Pizza
D.
Kebabs.
【单选题】_____ be sent to work there when you are away? [ ]
A.
Who do you suggest who should
B.
Do you suggest who should
C.
Who do you suggest
D.
Do you suggest whom should
【单选题】听力原文：M: Excuse me, do you mind answering a few questions? W: No. M: Um firstly, do you ever eat fast food? W: Yes, yes, I do. M: What kind of food do you normally eat? W: Oh, err, you know, burgers, s...
A.
French fries.
B.
Bagels.
C.
Sandwiches.
D.
Burgers.
【简答题】非线性失真是指正弦波信号通过某电路后输出的波形中除包含原基波分量外,还含有其他( )分量,相对于原波形产生了畸变。
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