【判断题】行走时,手臂前摆动的幅度为30~35度,后摆动幅度为15度。
【判断题】在信用证业务中开立汇票的依据是信用证,而托收和汇付开立汇票的依据是合同。
【单选题】I must make________clear that everyone here can’t be late for the meeting.
【单选题】The report you’ll ______must be clear and correct.Don’t let the typist make any spelling mistakes.
【单选题】Remember that there is still one point ______ we must make clear at the conference tomorrow.
【多选题】纯化水制备系统中设计活性碳过滤器过滤的目的是