【单选题】By using eye contact, the speaker should do the following except_______.
A.
Establishing eye contact with the whole audience
B.
Staring at one audience all the time.
C.
Scanning your audience of a large group.
D.
Avoiding reading script from your cellphone.
【判断题】如信用证中规定了明确的到期日,则该信用证的有效期即到此日为止。( )
【单选题】沙皇俄国在下列哪个条约中割去乌苏里江以东 40 万平方公里领土
【简答题】请在右图工件上标出定位与夹紧符号 。 注意:有两处辅助支承,需标注出来!