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【单选题】
下面是某非熟练劳动力市场的需求和供给表。 工资 (美元 / 小时) 需求量 (百万小时 / ) 供给量 (百万小时 / ) 3 50 30 6 40 40 9 30 50 如果最低工资为每小时 3 美元,每的就业为( )百万小时,失业为( )百万小时。(注:最低工资指政府规定市场价格不能低于该价格)
A.
30,10
B.
30,0
C.
40,0
D.
40,10
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within
B.
at
C.
through
D.
by
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【单选题】- I think John will win the race. - Yes, he started off ________ a great speed.
A.
with
B.
at
C.
through
D.
by
【单选题】考虑下面的各项应用,试从下列材料中选择 最合适的材料 :铝合金、 SiC (一种结构陶瓷)、钢 A (成分为 Fe10.8%C0%Mn )、钢 B (成分为 Fe0.05%C2%Mn )。 用作摩托雪橇的支撑结构的钢。
A.
铝合金
B.
SiC
C.
钢 A (成分为 Fe10.8%C0%Mn
D.
钢 B (成分为 Fe0.05%C2%Mn )
【单选题】He thinks he will do it himself ______ asking his parents for help.
A.
rather than
B.
other than
C.
instead of
D.
in place of
【单选题】Chinese speed skater, Li Jianrou was a dark horse. She     to win the gold medal before the race sta
A.
Chinese speed skater, Li Jianrou was a dark horse. She ____to win the gold medal before the race started. A.didn’t expect
B.
wasn’t expected
C.
wasn’t expecting
D.
hasn’t expected
【单选题】考虑下面的各项应用,试从下列材料中选择 最合适的材料 :铝合金、 SiC (一种结构陶瓷)、钢 A (成分为 Fe10.8%C0%Mn )、钢 B (成分为 Fe0.05%C2%Mn )。 必须在较高温度下保持刚度,但不承受冲击载荷的材料。
A.
铝合金
B.
SiC
C.
钢 A (成分为 Fe10.8%C0%Mn )
D.
钢 B (成分为 Fe0.05%C2%Mn )
【单选题】Every time _____ he thought of his past, he couldn't help bursting _____. [     ]
A.
when; out tears
B.
that; into crying
C.
which; into cry
D.
/; out crying
【单选题】His timely warning was_____ help us avoid being cheated.
A.
so as to
B.
such as to
C.
so that
D.
such that
【单选题】________ his help, I finally caught up with my classmates.
A.
Rather than
B.
In spite of
C.
Instead of
D.
Thanks to
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