We were flying_______the clouds and saw the blue sky. [ ]
A. over
B. on
C. above
D. up
答案:C
下列物质性质递变正确的是( )
A.原子半径:C、Al、K依次增大
B.热稳定性:HF、NH3、SiH4依次增强
C.水化物的酸碱性:NaOH、Al(OH)3、Mg(OH)2碱性减弱
D.非金属性:Cl、P、S依次增强
每逢经期肢体疼痛麻木,肢软乏力,月经量少,色淡质稀,其辨证为()
A.血瘀
B.阴虚
C.血虚
D.气滞
E.寒湿