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【单选题】
Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. (10 points)17（）
A．as
B．of
C．like
D．about
A.
Air is (1) , and like all matter, it has weight. Weight is the measure of the (2) of gravity (3) matter. If a scale registers 10 kilograms when a stone is placed on it, this means that gravity pulls the stone with that (4) force. (5) , earth’ s gravity pulls on each (6) of gas and dust on the atmosphere. Because our atmosphere is a. vast (7) of air, it has (8) . If it could (9) be compressed and put on a (10) of scales, it would weigh about 5,700,000,000,000,000 (quadrillion) metric tons.
B.
The air pressed down on us and against us (11) all sides. Something (12) a ton of air is pressing against you at this moment. You are not (13) of this because air pressure within your body (14) the pressure of the air outside.
C.
Air pressure is 1. 036 kilograms per square centimeter (14.7 pounds per square inch) at sea (15) . It is greatest there because that is the (16) of the atmosphere. (17) higher altitudes the pressure is (18) . That is why the (19) of highflying planes are pressurized. They are designed to (20) the air pressure our bodies must have.
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【单选题】()you call me to say you're not coming, I'll see you at the theatre.
A.
Though
B.
Whether
C.
Until
D.
Unless
【单选题】下列关于自由表的说法中，正确的是（ ）。
A.
可以为表中的字段指定标题和添加注释
B.
可以指定表中字段的默认值和输入掩码
C.
只能建立候选索引、惟一索引和普通索引
D.
支持主关键字、参照完整性和表之间的联系
【单选题】Why is the UK government's move to attract foreign high-tech workers criticized
A.
Because the UK government offers higher salaries and better working conditions to foreign high-tech workers than to native high-tech workers.
B.
Because the UK government offers higher salaries and better working conditions to native high-tech workers than to foreign high-tech workers.
C.
Because the UK government imposes many very strict regulations on foreign high-tech workers while trying to attract them.
D.
Because while the UK government is trying to attract foreign high-tech workers native information technology workers are driven abroad because of improper tax rules.
【单选题】It can be inferred that in Germany __________.
A.
all people welcome the "Green card" scheme
B.
only presidents of companies welcome the "Green card" scheme
C.
only those unemployed oppose the "Green card" scheme
D.
some people oppose the "Green card" scheme