染色体核型为t(15;17)(q22;q22)见于（  ）

单项选择题The word 'sparked' in line 11 is closest in meaning to ______.A.brought aboutB.surroundedC.sent outD.followed

单项选择题The phrase 'take a sounding of the ocean beneath our restless keels' most nearly means ______ .A.to find out the depth of water while sailing at seaB.to explore the environment we are living inC.to listen to the current movement beneath the shipD.to try to find out in depth the wonder and mystery of life