The ______ in E-mail messages has affected almost every computer around the world and has
A. illness
B. virus
C. weakness
D. attachment
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回力卡环可减小基牙直接承受的颌力()
A. 近中支托与基托直接相连
B. 远中支托不与基托直接相连
C. 近中支托与基托不直接相连
D. 近中支托不与基托直接相连
E. 无支托与基托相连
Accurately assessing______has always been the only method of lending successfully.
A. the security's realizable value
B. the borrower's creditworthiness
C. the borrower's cash flow condition
D. liquidity of the borrower's assets
2岁小儿，体重8kg，生后6个月开始出现口唇发绀，无肺炎病史，查体：轻度杵状指，胸骨左缘第3肋间闻及Ⅲ级收缩期喷射性杂音，肺动脉瓣区第二音单一响亮。X线胸片显示心影呈"靴型"，两肺清晰透亮。
该患儿最可能的诊断
A. 房间隔缺损
B. 室间隔缺损
C. 动脉导管未闭
D. 肺动脉瓣狭窄
E. 法洛四联征
What is special about fox hunting in Britain？
A. h involves the use of a deadly poison;
B. It is a costly event which rarely occurs.
C. The hunters have set rules to follow.
D. The hunters have to go through strict training.
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