问题
单项选择题
前轮转弯系统中，旁通活门的功用是（）
A.连接转弯作动筒两个腔
B.隔开转弯作动筒两个腔
C.向转弯作动筒供压
D.A+B
答案
参考答案：D
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前轮转弯系统中，旁通活门的功用是（）
A.连接转弯作动筒两个腔
B.隔开转弯作动筒两个腔
C.向转弯作动筒供压
D.A+B
参考答案：D
| 用方框中所给词的适当形式填空 | |
2. After I did the dishes, I _____ the floor. 3. I can see what you _____. 4. I want _____ you for help. 5. Why not _____ the dirty clothes? 6. They invited the readers _____ a meeting. 7. It took me half an hour _____ dinner. 8. The backpack isn't hers. It's _____. 9. If you keep making this kind of mistake, our teacher will _____ angry. |