按锚固原理分，先张法预应力混凝土构件中的预应力筋属于（）。
A.支承锚固
B.楔紧锚固
C.握裹锚固
D.组合锚固
参考答案：C
The girl____was my girlfriend.
A．you just talked
B．whom you just talk to her
C．who you just talked
D．whom you just talked to
设计流量
