Aschoff bodies(阿少夫小体)见于
A．高血压B．风湿心肌炎C．溃疡性心内膜炎D．动脉粥样硬化
参考答案：B
非必需氨基酸为( )。
A．Trp、Phe B．Leu、Ile C．Thr、Val D．Lys、MetE．Glu、Asp
The boy is going to be a _______ because he wants to fly in the sky.[ ]
A. teacher
B. engineer
C. farmer
D. pilot
