A:where
B:a
C:that
D:what
Tom can play the guitar, ________ he can't play it very well.
往硫酸和硫酸铜的混合稀溶液中,加入一定量的铁粉,若充分反应后,过滤得滤液和剩余固体,则依此推论正确的是( )
小强学习了中国地理后,在日记中这样描述其地理位置,你认为正确的是( )
About seven item of information can ____ ____ at a time by short-term memory.