诊断动脉粥样硬化必须在动脉内膜见到：
A．大量泡沫细胞聚集B．平滑肌细胞增多C．大量淋巴细胞浸润D．钙盐沉着E．纤维组织增生玻变
参考答案：A
用 am，is，are 填空。
1. She bored.
2. I sick.
3. If you sick, see the doctor.
4. Mr Black angry with his computer.
5. Today is Children's Day. We all very happy.
6. I excited because I will go to Beijing this summer.
下列物质中，熔点由低到高排列的顺序应该是（）。
A．NH3＜PH3＜SiO2＜CaO
B．PH3＜NH3＜CaO＜SiO2
C．NH3＜CaO＜PH3＜SiO2
D．NH3＜PH3＜CaO＜SiO2
