具有收敛止汗作用的安神药是();具有祛痰开窍作用的安神药是()
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If you are guilty of failure to properly perform your duties as Operator of Uninspected Towing Vessels,which of the following actions may NOT be taken? ()
A. Issuance of a letter of warning
B. Suspension of your license
C. Revocation of your license
D. A fine placed against your license
在Photoshop中对图像进行编辑时,实际上是对该图像中的()进行编辑。
A. 图形
B. 位图
C. 像素
D. 矢量图
柴油机的燃烧从着火开始到气缸出现最高压力时止,这一阶段称()。
A. 速燃阶段
B. 主燃阶段
C. 过后燃烧阶段
D. 着火落后期阶段