—That's a great sweater.I have never seen anything like it before.
—You think so? My grandmother ________ it for me. ( )
A:makes
B:made
C:has made
D:had made
秦长城的起止点是( )
①嘉峪关 ②临洮 ③山海关 ④辽东
地球的各大板块中,几乎全部为海洋的是( )
在探究“电流与电阻的关系”的实验过程中,小明选择了5Ω、10Ω、20Ω、25Ω五个电阻进行实验,电路图如图甲所示.