健康人肾小囊液中几乎不含有的物质是( )
A:水
B:尿素
C:大分子蛋白质
D:无机盐
—How old is that elephant? —It's 1.43 tons. ____
已知函数fx=1+sinπx2,若有四个不同的正数xi满足f(xi)=M(M为常数),且xi<8,(xi=1,2,3,4),则x1+x2+x3+x4的值为( )
I love singing and dancing. I want to be actor in the future.
多音字组词
供 gōng ____ gòng____
挣 zhēng____ zhèng____
倒 dào____ dǎo____