防止食品腐败可以采用不同的方法,下列适于较长时间保存食品的是( ) ①高温 ②低温 ③保持湿润 ④保持干燥 ⑤暴露在空气中 ⑥隔绝空气.
There is ________ bank across from the hospital.
a
an
the
/
—Do you know about rock music?
—________. Ask Robert. He is a fan of rock music.
No idea
No wonder
No way
No problem
—Could you tell me ________?
—It’s about 6,300 kilometres long.
how wide is the Changjiang River
how wide the Changjiang River is
how long is the Changjiang River
how long the Changjiang River is
Before you get off the bus, you should wait ________ it has stopped.
until
but
because
so
A lot of birds ________ in nature parks every year.
protect
is protected
are protected
protected