法洛四联症平片的X线表现为()
A.靴形心脏
B.右室增大
C.左房不大
D.肺血减少
E.左心室增大
参考答案:A, B, C, D
A new club in our school at the beginning of this year and now it has many members.[ ]
A. starts
B. is started
C. has started
D. was started
电子天平的磁钢必须严格保护,以下说法错误的是。()
A、不得尘土落入
B、不得赃物落入
C、应轻那轻放
D、以上均不正确