W: I don't think so. It must be the window-cleaner working upstairs.
Q: Where does the woman think the noise is coming from？
(2)
A. From upstairs.
B. From next door.
C. From the Nelsons' house.
D. From the back door.
查看答案
如下图所示的单杆活塞缸，当有杆腔进油，工作台右移时，速度为v1，推力为F1)；当无杆腔进油，工作台左移时，速度为v2，推力为F2。下列四种情况中正确的是()。
A. v2＜v1，F2＜F1
B. v2＜v1，F2＞F1
C. v2＞v1，F2＞F1
D. v2＞v1，F2/＜F1
A．In July.B．In March.C．In September.D．In the winter.
A. In July.
B. In March.
C. In September.
D. In the winter.
A．She was afraid of the professor.B．She didn't enter her house.C．She didn't make full
A. She was afraid of the professor.
B. She didn't enter her house.
C. She didn't make full preparations for her lessons.
D. She lost her key.
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