太阳是地球陆地上的万物之母。 [ ]
×
镁带投入到食醋中,能证明其是化学变化的现象是( )
①镁带逐渐减少,直至消失 ②镁带表面有大量气泡产生
③溶液的温度略有升高 ④食醋气味逐渐减轻,直至消失.
A.①②③
B.①③④
C.①②④
D.①②③④
The Whites _______many places of interest since they came to China. [ ]
A. have visited
B. will visit
C. visited
D. visit