()等资产的流动性较弱,可作为第二储备
A. 金银
B. 活期存款
C. 现钞
D. 债券
E. 汇票
He _______ bring back a no longer used method.
A. proposes to
B. proposes
C. suggests to
D. suggests
Underground tubes were used in many cities to _______ the transport of mail between post offices and government buildings.
A. speed high
B. speed up
C. lift up
D. lift off
The _______ air was used to push the capsules from one station to the next.
A. compress
B. compressing
C. compressed
D. to compress
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