下列不属于多层住宅单元组合方式的是()。
A.平直组合
B.错位组合
C.转角组合
D.纵横组合
参考答案:D
解析:多层住宅单元组合方式有:平直组合、错位组合、转角组合、多向组合等。
Based on a recent survey of the attitudes of people on Medicare is ______.
A.the capital city of the United States of America
B.a textbook on American politics
C.what the author is going to write
D.a statement that the American government cannot fool its people
如图所示,直角刚杆AO=2m,BO=3m,已知某瞬时A点的速度vA=6m/s,而B点的加速度与BO成β=60°角。则该瞬时刚杆的角加速度α的大小为:()
A.A
B.B
C.C
D.D