size
moisture content
altitude and how they were formed
location in a front
第1题：
Dangerous goods of packaged form and solid form are classified into nine classes according to their ________ ．
A.package forms
B.natures
C.physical properties
D.chemical properties
第2题：
What is the first visible indication of the presence of a tropical cyclone or hurricane ________．
A.Stratocumulus clouds or strange birds
B.Rain and increasing winds
C.An exceptionally long swell
D.Dark clouds and the“bar”of the storm
第3题：
Idioms can be classified in different ways but the classification according to grammatical function is the most helpful way.()
第4题：
第5题：
High clouds, composed of small white flakes or scaly globular masses, and often banded together to form a mackerel sky, would be classified as ______.
A.cirrus
B.cirrocumulus
C.altostratus
D.Cumulonimbus
第6题：
Clouds with the prefix“nimbo”in their name ______．
A.are sheet or layer clouds
B.have undergone great vertical development
C.are middle or high altitude clouds
D.are rain clouds
第7题：
Altocumulus clouds are defined as______．
A.high clouds
B.middle clouds
C.low clouds
D.vertical development clouds
第8题：
The challenge that newspapers faced from the website is______.
A．the display ads and the classified ads
B．the classified ads and the small text-ads
C．the small text-ads that appear alongside search engines
D．the localization of website and more elaborate service
第9题：
第10题：
Ships can be classified according to what they carry.（）