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【单选题】
Create a conversational but professional tone in letters, e-mail messages, instant messages, and memos byA.
choosing a clear format and effective document layout.
B.
using emoticons
C.
using familiar words, occasional contractions, and pronouns such as you and I .
D.
using slang and abbreviations such as IMHO and BTW.
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皮皮学刷刷变学霸
举一反三
【单选题】The stone chip is thought to be the most important tool because it _______.
A.
was one of the first tools
B.
developed human capabilities
C.
led to the invention of machines
D.
was crucial to the development of mankind
【简答题】喉癌分型正确的是 C A会厌癌 声门癌 喉咽癌 B喉室癌 梨状窝癌 声门癌 C 声门上癌 声门癌 声门下癌
【单选题】What happened one night?
A.
The dog fell iii and barked all night long.
B.
The dog played a trick on the speaker.
C.
The dog awakened the speaker and led him to help its master.
D.
The speaker had a nightmare in which he saved his neighbour's life.
【单选题】In the polar regions, the dog mainly ______.
A.
carried supplies
B.
provided companionship
C.
tracked prey
D.
herded caribou(驯鹿)
【单选题】肿瘤发生、发展的三个阶段是
A.
癌前病变，原位癌，浸润癌
B.
癌前状态，癌前病变，原位癌
C.
临界癌，早期癌，浸润癌
D.
癌前病变，临界癌，原位癌
E.
癌前状态，临界癌，早期癌
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