China sent up Shenzhou Ⅸ manned spaceship into space successfully, which shows science and technology ______ rapidly in China.

A．have been developing

B．have developed

C．has been developed

D．is developing

NSW型手制动机锁闭功能试验：用三角钥匙（）转动时须锁闭，逆时针方向转动时须开锁。

A.左右方向

B.顺时针方向

C.右逆时针方向

D.左顺时针方向