正确答案: BCD

鸡的产蛋率与体内的雌激素水平密切相关 鸡的产蛋行为受神经调节和体液调节共同作用 鸡的产蛋行为受遗传因素和环境因素共同影响

题目：养鸡场鸡舍中清晨和傍晚用稳定的灯光延长光照时间．以提高产蛋率。下列分析正确的是

解析：BCD

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举一反三的答案和解析：

[单选题]塔赫他间等人用( )来解释植物界的系统发生。

幼态成熟学说

[单选题]——Guess what ,we’ve got our visas for a short —term visit to the UK this summer. ——How mice! you a different culture then.

will be experiencing

[单选题]

turn

[单选题]请听第7段材料，回答第9至11题。第9题：What is the purpose of this talk?

To explain the arrangement

[多选题]第二节: Bryan、Olga、Scott、Anna 和David正在进行一项“企业家成功秘诀调查”。他们将采访几位企业家。第61-65题是他们拟定的采访话题。阅读下面刊登在Entrepreneur(《企业家》)杂志上6位企业家的成功感言（

解析：61.E    62.A    63.F   64.D   65.B

[单选题]The lady welled around the shops_______, an eye out for bargains.

keeping

[单选题]Cindy shut the door heavily and burst into tears. No one in the office knew shewas so angry.

why