【单选题】根据波士顿矩阵,( )是厚利商品,指处于低增长率、高市场占有率象限内的商品群;其特点是销量大、利润率高、负债率低;可以为企业提供资金,而且由于增长率低,也无需增大投资。
【简答题】人类和果蝇都是XY型性别决定的生物。在人类和果蝇中性染色体和性别的关系如表所示。 根据以上材料回答下列问题: (1)人类男性的性别取决于______染色体,该染色体上基因的遗传特点一般是_____________。 (2)性指数是指X染色体的数量和常染色体组数的比,果蝇的性别取决于性指数,当性指数≥1时,果蝇为_______性;当性指数≤0.5时,果蝇为_______性。 (3)某人性染色体组成为...
【单选题】以下关于双眼视觉异常检查方法的说法中错误的是
C.
调节幅度的检测方法包括:移近法、负镜片法和动态检影法
E.
调节灵活度检查时负镜减慢表明加大调节功能障碍或负融像性聚散功能障碍
【单选题】听力原文:M: Hello! May I speak to Mrs. Arnold? W: Speaking. M: This is Sparkle Company. You are one of the lucky housewives chosen to receive our free soap. W: That's very nice of you. But I'd rather go o...
C.
At an information desk.
【单选题】听力原文:M:The movie is really exciting.Authentic explosions,spectacular car chases,excellent special effects,and kung fu,you know,that's my favorite part.How do you like it? W:I am wondering why I let yo...
A.
She likes the kung fu part best.
B.
She thinks that it is exciting and excellent.
C.
She doesn't show much interest in it.
D.
She thinks it as boring as TV.
【单选题】以下关于双眼视觉异常检查方法的说法中错误的是
C.
调节幅度的检测方法包括:移近法、负镜片法和动态检影法
E.
调节灵活度负镜减慢表明加大调节功能障碍或负融像性聚散功能障碍
【单选题】关于遗传对心理发展的影响,下列说法正确的是().
【单选题】听力原文:W: Hi, Professor Higgins. M: Hi, Julia. W: Would you be able to help me organize my essay? M: Certainly. What topic have you chosen? W: Women in Politics. M: That topic is very broad. I think you...
A.
Narrow down the topic of her article.
B.
Read and revise her essay.
C.
Provide some facts for her opinion.
D.
Give her some advice on writing a paper.
【单选题】夏季我国雨带大致与西太平洋副高脊线平行,通常位于: