内环境中含有多种成分,()、抗体、淋巴因子、血浆蛋白、葡萄糖、尿素等都是内环境的成分。
参考答案:激素
–-My TV set doesn’t work, the water tap is dripping and my car is still under repair!
–-You sure ________ bad luck these days.
A.are having
B.will have
C.had had
D.had
下列变化属于化学变化的是( )
A.白磷自燃
B.空气液化制氧气
C.干冰变成二氧化碳气体
D.在晾干的咸菜表面出现食盐晶体