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问题 单项选择题

2003—2007年，甲国平均每年比乙国少排放的碳总量为（）

A．30亿吨

B．48亿吨

C．55亿吨

D．60亿吨

答案

参考答案：B

解析：

由条形图可知

碳排放量(亿吨)2003年2004年2005年2006年2007年
甲国10371132118912891401
乙国12561263125412531262
乙国一甲国21913165-

36

—139

故所求为(219+131+65-36-139)÷5=240÷5=48亿吨，正确答案为B。

单项选择题

肠结核最好发于

A．回盲部
B．空肠
C．降结肠
D．十二指肠
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单项选择题

More and more residences, businesses, and even government agencies are using telephone answering machines to take messages or give information or instructions. Sometimes these machines give (1) instructions, or play messages that are difficult to understand. If you (2) telephone calls, you need to be ready to respond when you get a (3)

The most common machine is the (4) used in residence. If you call a home (5) there is a telephone answering machine (6) you will hear several rings and then a recorded message that (7) says something like this: "Hello. We can’t come to the (8) right now. If you want us to call you back, please leave your name and number after the beep." Then you will hear a "beep", (9) is a brief, high-pitched (10) . After the beep, you can say who you are, whom you want to speak to, and what number the person should call to (11) you, or you can leave a (12) . Some telephone answering machines record for only 20 or 30 seconds after the beep, (13) you must respond quickly.

Some large businesses and government agencies are using telephone answering machines to provide information on (14) about which they receive a large volume of (15) . Generally speaking, using these systems (16) you to have a touch-tone phone ( a phone with buttons rather than a rotary dial). The voice on the machine will tell you to (17) a certain button on your telephone if you want information on Topic A, another button for Topic B, and so on. You listen (18) you hear the topic you want to learn about, and then you push the (19) button. Immediately after making your (20) , you will hear a recorded message on the topic.

5（）

A．impossibly

B．hardly

C．always

D．usually
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