单项选择题

The shortcomings of the petrol engine in the nineteenth century include the followings except （）.

A.unreliable nature of the ignition system
B.very expensive and not efficient enough
C.no spark plug is used
D.high fire risk caused by petrol

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单项选择题

An automobile includes the following major categories：the body，the engine，（）and the electrical system.

A.steering system
B.power source
C.chassis
D.ignition system

单项选择题

The term tone in literature means（）.

A.sound effect such as rhyme and metrical device
B.the pitch of a word used to determine its meaning in the given context
C.the manner of expression to indicate the speaker’s attitude towards the subject
D.a shade of colour to reflect the change of the light