阵发性睡眠性血红蛋白尿时，不出现下述哪个结果
A．轻度黄疸B．白细胞及血小板减少C．骨髓三系增生低下D．红细胞对酸的抵抗力增高
参考答案：D
用动词be (am, is, are)填空。
1. She _____ a teacher. Her name _____ Mary.
2. I _____ a boy. My name _____ Li Ming.
3. Who _____ this girl? She _____ Li Mei.
4. How old ______you? I _____ eleven.
5. What _____ this? It _____ a bird. Its name _____ Polly.
6. David _____ a student. His sister _____ a student, too.
7. These books _____ blue. They _____ English books.
8. Li Lei _____ at school today. He _____ drawing a picture now.
9. Amy and Kay _____ here. They _____ not at home.
10. _____ you teachers? No, we _____ not. We _____ students.
11. My favorite color _____ blue.
12. Tom's brother _____ not in the room.
在防烟排烟系统的活动挡烟垂壁的调试中，常用的检查方法不包括（）。
A.观察
B.查阅有关文件
C.测定
D.记录
