46+23=____ 56+42=____ 63+35=____41+26= ____ 86+11= ____
要使一根镍铬合金线接入电路的电阻变大,可采用的方法是( )
—Do you have Mary's address?
—Sorry, I don't have it ______ me at present.
豌豆果实示意图如图所示,那么该豌豆子房内的胚珠数量至少有( )