help的现在分词是____.
dōng xuě
zuǒ yòu
huǒ bàn
zhāo hu
kuài lè
____
yě xǔ
tīng shuō
zhēn hǎo
gè zhǒng gè yàng
——Would you like to drink? Tea, coffee or milk?——Oh, kind of drink is OK, thanks.
如图所示的实验过程中,下列说法正确的是 ()
李爷爷患上了骨质疏松症,体内可能缺乏( )