The photoperiodic response of algae actual_爱下问搜题

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问题单项选择题

The photoperiodic response of algae actually depends on the duration of darkness, but not on the response of light.

A．is not on light

B．but is not on the light

C．and not on light

D．the light is not on

答案

参考答案：C

解析：本句意为：海藻的光周期反应事实上依黑暗的持续时间而定，而不是靠光的反应。英语中表示并列用and，抽象名词和物质名词前不加冠词。因此C为答案。

完形填空

完形填空
I came to study in the US last fall. My life had been quite 1 since I arrived at
Andover. Although I had quite a few extracurricular (课外的) activities, I hadn’t taken any official leadership position.
This 2 changed when I received an e-mail from Ms Griffith, my cluster dean (主
任),    3 that a few female DC Rep was needed. DC Rep 4 Discipline Committee Representative. 5 boarding school students break serious rules, like using 6 , getting drunk or cheating in the studies. The punishments given to such students are   7 by a DC Rep, a house counselor, two student representatives, the cluster dean. I was really interested in becoming a DC Rep for my cluster, Pine Knoll, 8 so were five other students. We had to hold   9 and Ms Griffith asked us to write 10 to be sent to everyone in Pine Knoll.
I thought hard about what to write. I didn’t want to make any   11 because they are difficult to keep. I didn’t want to say I was experienced, because I was not. So I started my speech by explaining 12  I wanted to become a DC Rep. “ I want to serve Pine Knoll and also learn how American boarding schools carry out disciplines,” I wrote 13 .
I made three   14 that said “ Vote For Teresa” and put them on every exit (出口处) of my dorm so that people would 15 my name when they went to vote.
Although I tried hard, I didn’t win the election, I was 16 . But my positive nature didn’t allow me to   17 for very long. I actually 18 when my friends tried to comfort（安慰） me. “Teresa, I’m sorry that you didn’t win the election,” they would say.
“ No, don’t be sorry for me. I am very happy to have taken part in the election.” I said.
It is true: the   19 is much more important than the result. I am surprised and happy to discover my hidden 20 .

A．carried out

A．a discussion

C．an election

D．a selection

C．compositions

D．introductions

B．advertisements

C．disappointed

单项选择题

喷油器每循环供油量在（）最多。

A、开始

B、中期

C、后期

D、无法判断