题目

已知豌豆种皮灰色（G）对白色（g）为显性，子叶黄色（Y）对绿色（y）为显性。如以基因型ggyy的豌豆为母本，与基因型GgYy的豌豆杂交，则母本所结籽粒的表现型（    ） A．全是灰种皮黄子叶 B．灰种皮黄子叶，灰种皮绿子叶，白种皮黄子叶，白种皮绿子叶 C．全是白种皮黄子叶 D．白种皮黄子叶、白种皮绿子叶24、Drinking water is good for your health．There are some scientific ways of drinking water． 1．It is the best medicine to drink two glasses of water in the morning． 2．Drink clean water． 3．Drink the water that has not been boiled． Many people think boiled water is safe and good to people's health．In fact，it is not true．The boiling point of water is 100℃．By boiling it，most bacteria in water can be killed．In the past，the water was less polluted，so boiling was a good way to make clean water．But heavy metals and other dangerous things in today's water are much more terrible than bacteria．Boiling doesn't fix that problem．And boiling water may give us more of the dangerous things in our glass． 4．Never use soft drinks to take the place of water． 5．Water is also needed in winter． 6．Drink water in the right time． 1）After getting up in the morning，you have less water in your body，because you weren’t drinking for the whole night．So you should drink some water to keep your health after getting up in the morning．That can prevent high blood pressure，cerebral haemorrhages（脑溢血），and so on． 2）Drinking water at about 10 am helps your body keep enough water． 3）Drinking water at about 3 pm can clean out the wastes in your body． 4）About eight o'clock in the evening is the best time to drink water．Your blood gets thicker when you sleep．Water will make your blood less thick． Besides，we should drink 2L of water every day．Water is so important for our life．We should drink water often． 1．According to the passage，         in the morning is the best         ． A．drinking some hot soup；medicine B．drinking some porridge；breakfast C．drinking some water；medicine 2．         can prevent high blood pressure，cerebral haemorrhages and so on． A．Drinking some water after getting up in the morning B．Drinking some water before going to bed C．Drinking some milk before going to bed 3．At about 3 pm，drinking water can clean out the          in your body． A．oil                                     B．food                                  C．wastes 4．From the passage，we can see the best time to drink water is         ． A．about eight o'clock in the morning B．about eight o'clock in the evening C．before supper 5．The best title（标题）to this passage is         ． A．Drink clean water                  B．Don’t drink the boiled water C．Scientific water drinking