The phrase "get the go-ahead" in the second paragraph probably means
A.be given permission to start doing something.
B.get the money needed to invest in something.
C.start in such a hurry that it involves some risks.
D.increase the output of the mining companies.
第1题
起重机的液压系统中,应有防止(),使液压马达超速的措施或装置。
A.超重
B.被吊重物驱动或臂架驱动
C.变辐过大
第2题
A.溢流阀
B.液压锁
C.平衡阀
D.单向阀
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