猪食道口线虫的感染途径是()
A. 经口感染
B. 经皮肤感染
C. 接触感染
D. 经节肢动物感染
E. 经胎盘感染
“If I so far away,I____ sooner,"“know. But that’s not the point!"
A. had not worked...would have come
B. worked...could come
C. had worked...might come
D. have been working...have come
在PHOTOSHOP中制作一RGB模式的色块R245G7B215,在油墨色设置为ToyoInk(Coated),DotGain为17%时,其颜色信息是C40%M80%Y0%K1%;在油墨色设置为Swop(Coated),DotGain为17%时,其颜色信息是C44%M77%Y0%K1%。这是什么原因?
1万米以上的飞行,1h的飞行可能受到()μSv的剂量。
A. 2-3
B. 3-4
C. 4-5
D. 5-6