小东画了一条10厘米长的射线．______．（判断对错）
小东画了一条10厘米长的射线，说法错误；
因为射线无限长；
故答案为：错误．
Andy lives near the library. You can go to the library with _______ and _______ sister.
A．his; his
B．him; his
C．him; he
D．he; his
钠和钾都是活泼金属，钾比钠更活泼。
