在机械加工工序和热处理工序间流转及存放时，丝杠须垂直倒挂，以免引起丝杠的“自重变形”。( )
参考答案：对
_his new sunglasses Tony look mysterious. [ ]
A. Wears ; make
B. Wears ; makes
C. Wearing; makes
D. Wearing; make
“应收账款”账户月末借方余额为30000元，“坏账准备”账户月末贷方余额为150元，则本月末应收账款净额为______元。
A．30150 B．30000C．29850 D．30320
