皮皮学，免费搜题
登录
搜题
【单选题】
经末梢静脉进行腔超声造影，其条件是A.
超声造影剂微气泡的直径必须小于5μm
B.
超声造影剂微气泡的直径必须大于5μm
C.
超声造影剂微气泡的直径必须小于10μm
D.
超声造影剂微气泡的直径必须小于3μm
E.
超声造影剂微气泡的直径必须大于10μm
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】From good reading we．can get pleasure, companionship, experience, and instruction．A good book may absorb our attention so completely that for the time being we forget our surroundings and even our ide...
【单选题】It's hard to confirm or refute that there's a causal relationship between the amount of fat we eat and the ______ of heart attacks.
A.
incidence
B.
impetus
C.
momentum
D.
emergence
【单选题】The purpose of the passage is to ______.
A.
analyze the possible causal links between Tibetan ecology and society
B.
describe the social organization of typical Tibetan villages
C.
describe Tibetan fauna and flora
D.
analyze the mysteries of the sudden appearance of the Himalayas
【单选题】This passage mainly discusses ______.
A.
causal reasoning
B.
various types of reasoning
C.
classification of causes
D.
the causal process
【简答题】七选五(注意联系上下文进行选择,总结答题技巧) Fearing a long, family car ride? In fact, a long car ride can give you a good chance to do lots of things. Read a book. During a long ride, an easy way to pass time would be to...
相关题目：