变种（variety）

[单选题]D．espite of the variety and individuality, Americans are fond of uniforms becauseA．a man who wears a uniform. can be respected by othersB．the uniform. looks more professional than common clothesC．they want to think, speak, and act similarlyD．they are

[单选题]A．ccording to the passage，a great variety of influenza strains can appear when______.A． H and N spikes are producedB． animal and bird viruses are combinedC． dissimilar types virus recombineD． two viruses of the same type are contracted

[单选题]A． variety of small clubs can provide _____ opportunities for leadership, as well as for practice in successful group dynamics.[A] durable[B] excessive[C] surplus[D] multiple

[名词解释] 测交种（test cross variety）

[问答题] 变种

[单选题]沙眼衣原体有A．1个变种B．2个变种C．3个变种D．4个变种E．5个交种

[试题]food is famous with its wide variety. The food in one area 78. ___________

[名词解释] 生化变种

[名词解释] 生化变种（biovar）

[问答题] 什么是变种名？