【单选题】Dr. Johnson was late because ______.
A.
there was something wrong with his car
B.
a strange man made it hard to drive
C.
he picked up the strange man
D.
the train to Glens Falls was late
【简答题】外分泌组织分为()和()两种。内分泌组织可分为()、()、()和()四类。
【简答题】A For those who are tired doing the laundry, Samsung has found an answer: a washing machine that can tell you when your laundry is done via a smartphone app(application). Strange though it may seem — ...
【简答题】根据分泌组织分泌物是否排出体外,分泌组织可分为______和______。