下列()不是CoreldRAW交互工具。
A、透明工具
B、立体化工具
C、透镜
D、调和工具
参考答案:C
Paper bags produced every year are ______ the world’s production of vehicles.
A.three times the weight of
B.three times weight of
C.as three times heavy as
D.three times as heavier as
依离心泵完好标准,机械密封要求轻质油泄漏不超过()滴/分
A、20
B、10
C、5