留给哲学的都是无法解决的问题。
参考答案：对
On the one side of the road grass should be planted, and ______.
A．on the other are flowers
B．on another flowers
C．on the other flowers
D．on another are flowers
蛋白肽类激素的第二信使（）
A.GTP
B.ATP
C.UTP
D.CAMP
E.CTP
