Things in the supermarkets are_______.
A. cheaper
B. more expensive
C. better
D. more
查看答案
Which is not the advantage of online shopping?
A. Save money.
B. Easy and quick.
C. Paying over the Internet isn’t always safe.
D. You can compare the prices of the same product.
How is online shopping changing our lives?
A. We don’t need to go to the shops to buy things.
B. We can shop at any time.
C. We can compare the prices of the same product and spend a lot… or save money.
D. Above all.
对“菌群失调”的解释是:( )
A. 细菌的致病力发生了改变
B. 机体抵抗力降低的一种表现
C. 正常菌群改变了寄居部位
D. 各菌群数量和比例发生变化
对血清\抗毒素除菌常采用:( )
A. 紫外线
B. 巴氏消毒法
C. 烧灼法
D. 过滤除菌法
E. 高压蒸气灭菌法
微信支付 
支付宝支付