Lb4B2074硬质合金回转钻进可以钻进9级（可钻性级别）岩石。
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脑水肿的防治中哪项不正确（ ）
A. 限制晶体液输入
B. 应用脱水、利尿药增加排出量
C. 局部低温
D. 冰袋血流降温
E. 早期应用。肾上腺皮质激素
绘制多边形时，在最后一个顶点处（），就绘制完成了一个多边形对象。
A. 单击鼠标
B. 双击鼠标
C. 单击鼠标右键
D. 双击鼠标右键
Which of the following statements is TRUE regarding automatic identification systems (AIS) ? （）
AIS may be used to make passing arrangements via ship-to-ship text messaging thus relieving a vessel operator from sounding whistle signals or making contact via radiotelephone
B. AIS may be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is still required to sound whistle signals unless the arrangement is made via radiotelephone
C. AIS cannot be used to make passing arrangements because the system does not have the ability to communicate from ship-to-ship in this manner
D. AIS cannot be used to make passing arrangements because the use of the ship-to-ship text messaging feature in this way is prohibited
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