当内环境的稳态遭到破坏时,必将引起[ ]
A.酶促反应速率的加快
B.渗透压下降
C.细胞代谢紊乱
D.糖尿病
答案:C
I think the students_____ at home on computers in 2020. [ ]
A. studied
B. will study
C. study
D. studies
某地100名12岁儿童的平均体重30kg,标准差5kg,利用正态分布原理估计该地12岁儿童体重的95%参考值范围是
A.17.3~42.9B.20.2~39.8C.28.7~31.3D.29.0~31.0E.21.2~38.9