对脑和长骨的发育最为重要的激素是()
A.生长素
B.甲状腺激素
C.去甲肾上腺素
D.雄激素和雌激素
E.甲状旁腺激素
参考答案:B
根据CT工作原理,X线穿过人体后首先被接收的部件是()
A.计算机
B.照相机
C.磁盘
D.探测器
E.阵列处理机
The decision was made ________ more medical teams would be sent to help people in the earthquake.
A.what
B.which
C.that
D.when