可能是预防接种伤寒的是
A.以上都不对B."O"、"H"都升高C."O"高"H"不高D."O"、"H"都不高E."O"不高"H"高
参考答案:E
按要求改变下列句子。
1. I have some nice books.(否定句)
2. My name is Lily.(用 what 提问)
3. This is Peter's bag.(用 whose 提问)
4. This is a pencil.(一般疑问句)
5. Mike is under the big tree.(用 where 提问)
6. Four peaches are on the table.(用 how many 提问)
下列属于正反馈的生理过程是()
A.腱反射
B.血液凝固
C.肺牵张反射
D.血糖浓度调节