【单选题】构件在一个平面内运动,最多有( )个自由度。
【简答题】The gene they discovered today doesn’t all those cases. (account for)
【判断题】只受两个力作用而平衡的构件称为二力构件。由于二力杆的两个力必沿这两个力作用点的连线,所以二力杆不一定是直杆,也可以是曲杆或其他刚性构件。
【多选题】根据印花税法律制度的规定,下列印花税应税凭证中,属于“产权转移书据”的有( )。
【单选题】Many firms today use RFID technology to ________.
A.
identify new target markets
B.
analyze threats and opportunities in the macroenvironment
C.
move toward environmental sustainability
D.
track products through various points in the distribution channel
【单选题】Which is not housekeeping gene?
【判断题】在监盘如看到风机因电流过大或摆动幅度大的情况下跳闸时,不应再强行启动
【多选题】根据印花税法律制度的规定,下列各项中,应征收印花税的有