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【单选题】
Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer. 听力原文:M: Women who are married, have children, and work feel guilty because they're not raising their children themselves. W: But women who are married, work and don't have children are pressured to have children. What does the man imply? (12)
A.
Married women do not have to feel guilty for not raising children themselves.
B.
Married women do not have to care about the pressure to have children.
C.
Married women should not work if they have got children.
D.
Married women can work even they have got children at home.
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【简答题】NSW型手制动机具有制动、缓解、()和锁闭等四种功能。
【单选题】国家通过()等方式,建立健全对位于饮用水水源保护区区域和江河、湖泊、水库上游地区的水环境生态保护补偿机制。
A.
财政转移支付
B.
税收优惠
C.
财政补贴
D.
资源共享
【简答题】若f(-x)=f(x)(-∞<x<+∞).在(-∞,0)内f'(x)>0且f"(x)<0,则在(0,+∞)内有______ (A)f'(x)>0,f"(x)<0   (B)f'(x)>0,f"(x)>0 (C)f'(x)<0,f"(x)<0   (D)f'(x)<0,f"(x)>0
【单选题】如果双缸四作用往复泵不采用群阀,则应有 个泵阀。
A.
2
B.
4
C.
8
D.
B或C
E.
:C
F.
、电动往复泵的滑油泵不润滑 。
G.
曲轴轴承
H.
连杆小端轴承
I.
活塞与缸套
J.
减速齿轮
【单选题】已知函数f(x)的导数为f′(x),若f′(x)<0(a<x<b)且f(b)>0,则在(a,b)内必有(  )
A.
f(x)=0
B.
f(x)<0
C.
f(x)>0
D.
不能确定
【单选题】如果双缸四作用往复泵不采用群阀,则应有 个泵阀。
A.
2
B.
4
C.
8
D.
B或C
【简答题】国家通过财政转移支付等方式,建立健全对位于饮用水水源保护区区域和江河、湖泊、水库上游地区的水环境生态保护()机制。
【判断题】NSW型手制动机具有制动、缓解、调力制动和锁闭等四种功能。( )
A.
正确
B.
错误
【单选题】国家通过财政转移支付等方式,建立健全对位于饮用水水源保护区区域和江河、湖泊、水库上游地区的()
A.
水环境生态治理机制
B.
水环境生态循环机制
C.
水环境生态全方面保护机制
D.
水环境生态保护补偿机制
【单选题】若f(x)<0,(a<z≤b)且f(b)<0,则在(a,b)内( )。
A.
f(x)>0
B.
f(x)<0< /div>
C.
f(x)=0
D.
f(x)符号不定
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