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【单选题】
2008年8月8日第29届奥运会将在北京举行．下列说法正确的是（ ）A.
奥运会期间使用的大型遥控飞艇充入的安全且轻的气体是氢气
B.
奥运会吉祥物“福娃”制品的外表材料纯羊毛是天然纤维
C.
奥运会场馆“鸟巢”使用的Q460特殊钢属于纯净物
D.
奥运会“祥云”火炬使用的燃料丙烷（C 3 H 8 ）不属于有机物
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【简答题】阅读理解。 Mum gives little Tom ten yuan. Then little Tom goes shopping. He gets on the bus and sits down next to an old woman. Then he sees the old woman's handbag is open. There is ten yuan in it. He qui...
【单选题】【卡诺循环】如图表示的两个卡诺循环,第一个沿 ABCDA 进行,第二个沿 ABC'D'A 进行,这两个循环的效率 的关系及这两个循环所作的净功 W 1 和 W 2 的关系是
A.
W 1 = W 2
B.
W 1 = W 2
C.
W 1 > W 2
D.
W 1 < W 2
【单选题】_______with what little Tom said, the teacher decidedto take him as his new student.
A.
To satisfy
B.
Havingsatisfied
C.
Satisfied
D.
Satisfying
【单选题】Don't worry! Tom is busy (忙的) but he has time to finish it. [ ]
A.
a little / a little
B.
a little / a few
C.
little / little
D.
a few / little
【单选题】As soon as little Tom had _______ a little from his shock, his first thought was to get away . [ ]
A.
returned
B.
benefited
C.
survived
D.
recovered
【单选题】As soon as little Tom had ________ a little from his operation at his back, his first thought was to get out to meet his friends.
A.
returned
B.
survived
C.
absorbed
D.
recovered
【单选题】【卡诺循环】如图表示的两个卡诺循环,第一个沿 ABCDA 进行,第二个沿 ABC'D'A 进行,这两个循环的效率 的关系及这两个循环所作的净功 W 1 和 W 2 的关系是
A.
W1=W2
B.
W1=W2
C.
W1>W2
D.
W1
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