A. They could drive the insects away. B. They could keep the plants well-watered. C. They could make the plants grow faster. D. They could build devices to trap insects. 参考答案:D 答案解析:细节题。结合问题,当听到文章读到If he is right时,注意听下文的解释:他们能够通过模仿发出叫声的植物来给昆虫设下陷阱(they could build traps that imitate
A. collision B. collaboration C. congestion D. confrontation 参考答案:A 答案解析:collision意为“碰撞,冲突”,例如:The liner is reported to have been in collision with an oil tanker. 据报道,这艘客轮与一
第34题: [单项选择]妊娠期母体乳房变化正确的是() A. 大量雌激素刺激乳腺腺泡发育 B. 大量孕激素刺激乳腺腺管发育 C. 泌乳由垂体催乳激素调节 D. 乳头增大、乳晕变黑 E. 一般妊娠晚期即有乳汁分泌 参考答案:D 答案解析:乳房于妊娠早期开始增大,充血明显。腺泡增生使乳房较硬韧。乳头增大变黑,易勃起,乳晕变黑,乳晕上的皮脂腺肥大形成散在的结节状小隆起(蒙氏结节)。妊娠期间大量雌激素刺激乳腺腺管发育,大量孕激素刺激乳腺腺泡