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The conference has been held to discuss the effects of tourism _______ the wildlife in the area.

in   B. on.   C. at  D. with

B


解析:

have effect on……,對……有影響

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We hear a lot about ten pregnancies and abortions. The word “abortion” brings varied images but the word “pregnancy” paints a baby. Everyone knows what a baby is but the difficult question is, when is a baby a baby?

In the first months of pregnancy, called the first trimester, vital organs are being formed. Three months after fertilization, the egg has already divided and is securely attached to the mother. Two weeks later, a simple brain, spine, nervous system and the beginning of some major organs are formed. By week seven, the face and other organs are forming and the heart starts to pump blood. A week later, the face is recognizable, and all the major internal organs are developed in their simple forms. The tongue is formed and fingers are distinct. It moves a lot but many women may not even know they are pregnant. By week twelve, all the internal organs are formed and most are working. Tiny little fingernails and toenails are growing and the baby can curl his toes, make a fist, frown, purse his lips, open and close his mouth, suck, swallow and urinate. Most abortion occurs during this stage of pregnancy.

In the second three months, the second trimester, eyebrows, eyelashes and hair are growing. The heart can be heard with a special device. Arms and legs are well developed. The baby is very active and can respond to noises outside the womb. By the end of this trimester, the limbs are well-developed and the baby tries them out regularly. He can also cough and hiccup. Some abortion are still performed at this stage of pregnancy.

In the final stretch before birth, the third trimester, the baby can already feel and respond very much like a full term baby. Born now, it can survive with special care. In some cases, abortions are still performed at this stage. In fact, in certain countries, partial birth aborted is practiced in which the baby is aborted prior to birth.

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